Here is some more information on this linking word. Note the use of punctuation.

Linking word: Moreover

Meaning: As well as; plus  (The second point is considered stronger than the first)

Common use 1: Connects between sentences

Grammar: Complete clause. Linking word + comma + complete clause

Example: Smoking is expensive. Moreover, it is harmful to your health.

Common error: Smoking is expensive, moreover it is harmful to your health.